<form>
    <div>文本框:<br><input type="text" name="t_name" placeholder=""></div>
    <div>文本框:<br><input type="text" name="t_name" placeholder=""></div>
    <div>文本框:<br><input type="text" name="t_name" placeholder=""></div>
    <div>Email:<br><input type="email" name="e_name" placeholder=""></div>
    <div>Email:<br><input type="email" name="e_name" placeholder=""></div>
    <div>密码框:<br><input type="password" name="p_name" placeholder=""></div>
    <div>单选按钮:<br><input type="radio" name="radio_name" value="1">A<input type="radio" name="radio_name"
            value="2">B<input type="radio" name="radio_name" value="3">C</div>
    <div>按钮:<br><button type="button" id="btn_id"></button></div>
</form>